Electric oil pump

Patent metadata

Field	Value
Publication number	US-12407227-B2
Application number	US-202118026581-A
Country	US
Kind code	B2
Filing date	Sep 14, 2021
Priority date	Sep 15, 2020
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

An electric oil pump comprises a stator assembly and an electronic control panel assembly which are electrically connected. The electronic control panel assembly comprises an electronic component. The electric oil pump further comprises a conductive pump housing and a conductive member that electrically connects a reference ground layer of the electronic control panel assembly and the pump housing. The above arrangement facilitates reducing electromagnetic radiation of the electronic control panel assembly, thereby reducing interference of the electromagnetic radiation of the electronic control panel assembly on the electronic component and/or other external devices.

First claim

What is claimed is:

1. An electronic oil pump, comprising a stator assembly and an electric control board assembly, wherein the stator assembly is electrically connected with the electric control board assembly; the electric control board assembly comprises an electronic component; the electronic oil pump further comprises a pump housing and a conductive member, the pump housing can conduct electricity, and the conductive member electrically connects a reference ground plane of the electric control board assembly with the pump housing,
wherein the electronic oil pump further comprises a partition member, at least part of the partition member is located between the stator assembly and the electric control board assembly; wherein the conductive member is used as an insert, and the partition member is formed by injection molding, along a height direction of the partition member, part of the conductive member passes through the partition member; wherein the joint between the conductive member passing through the partition member and the partition member is sealed,
wherein the partition member comprises a first convex part, the first convex part protrudes from an upper surface of a main body of the partition member, and the conductive member passes through the first convex part: wherein the first convex part comprises a groove, and the groove is recessed from the upper surface of the first convex part, the groove does not reach the lower surface of the main body of the partition member, the conductive member passing through the main body of the partition member passes through the groove, sealant is filled between the outer periphery of part of the conductive member and the inner wall of the groove, and this part of the conductive member is located in the groove.

2. The electronic oil pump according to claim 1 , wherein the pump housing comprises a first housing, the first housing is at least partially arranged on the periphery of the stator assembly; the conductive member comprises a first part and a second part, the first part is electrically connected with the reference ground plane of the electric control board assembly, the second part abuts against the inner wall of the first housing; the reference ground plane of the electric control board assembly is electrically conducted with the first housing through the conductive member.

3. The electronic oil pump according to claim 2 , wherein the electric control board assembly comprises a substrate, the substrate comprises a first surface and a second surface, the first surface is closer to the stator assembly than the second surface; wherein the electric control board assembly further comprises an abutting part, the abutting part is located on the first surface, and the abutting part is electrically connected with the reference ground plane of the electric control board assembly, the first part is in contact with the abutting part and electrically connected with the abutting part.

4. The electronic oil pump according to claim 2 , wherein the electric control board assembly comprises a substrate, the substrate comprises a first surface and a second surface, the first surface is closer to the stator assembly than the second surface; the substrate comprises a through hole, the through hole is defined in a thickness direction of the substrate, the first part inserts into the through hole and is tightly matched with the through hole.

5. The electronic oil pump according to claim 2 , wherein the conductive member is at least partially elastic, and the elastic conductive member comprises an inclined part, the front end of the inclined part is connected with the second part, or, the second part is located at the front end of the inclined part, the inclined part is integrally provided with the second part; the inclined part is disposed at an angle with the inner wall of the first housing.

6. The electronic oil pump according to claim 5 , wherein the conductive member comprises a first conductive part and a second conductive part, the first conductive part and the second conductive part are arranged separately, the first conductive part and the second conductive part are in contact and connected; the second conductive part has elasticity, the first part is formed on the first conductive part, and the second part is formed on the second conductive part.

7. The electronic oil pump according to claim 6 , wherein the second conductive part comprises a body part and a limiting part, one end of the limiting part is connected with one side surface of the body part, the other end of the limiting part is connected with the other side surface of the body part, the inclined part is connected with the upper end of the body part, the second part is located at one side of the body part, and part of the limiting part is located at the other side of the body part; wherein the limiting part is provided with an accommodating cavity, the first conductive part passes through the accommodating cavity, a first end of the first conductive part is located at one side of the limiting part, and a second end of the second conductive part is located at the other side of the limiting part; wherein the first conductive part is in contact with the body part.

8. The electronic oil pump according to claim 7 , wherein the limiting part further comprises a first sub-part and a second sub-part, a first end of the first sub-part is connected with the first side surface of the body part, a second end of the first sub-part is a free end, and a first end of the second sub-part is connected with the second side surface of the body part, a second end of the second sub-part is a free end, and the second end of the first sub-part has a set distance from the second end of the second sub-part.

9. The electronic oil pump according to claim 6 , wherein the stator assembly comprises a stator core, a winding and an insulating frame, the insulating frame covers at least part of the surface of the stator core, and the winding is wound around the insulating frame, the first end of the first conductive part is electrically connected with the reference ground plane of the electric control board assembly, the second end of the first conductive part is connected with the insulating frame, the first conductive part is non-electrically connected with the winding.

10. The electronic oil pump according to claim 1 , wherein the electronic oil pump comprises a shielding member, the stator assembly, at least part of the shielding member and the electric control board assembly are distributed along the height direction of the electronic oil pump, at least part of the shielding member is located between the stator assembly and the electric control board assembly; the shielding member is made of conductive metal material, and at least part of the shielding member covers at least part of the winding of the stator assembly.

11. The electronic oil pump according to claim 10 , wherein the electronic oil pump further comprises a partition member, at least part of the partition member is located between the stator assembly and the electric control board assembly; the shielding member is connected with the partition member.

12. The electronic oil pump according to claim 11 , wherein the partition member further comprises at least two protruding posts, along the axial direction of the partition member, the at least two protruding posts are convexly arranged from the end face of a main body of the partition member; the shielding member comprises at least two through holes, and the at least two protruding posts pass through the through holes, the shielding member and the partition member can be fixedly connected by hot riveting the part of the

Assignees

• Zhejiang Sanhua Automotive Components Co Ltd

Inventors

• Liu Lili
• Sun Dongdong
• Ye Wei
• Shi Weijie

Classifications

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02K11/02

  for suppression of electromagnetic interference · CPC title

• F04C2240/40

  Electric motor · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F04C2210/206

  Oil · CPC title